docs: def filesize(value):
      '''Display a human readable filesize'''
      suffix = 'o'
      for unit in '', 'K', 'M', 'G', 'T', 'P', 'E', 'Z':
          if abs(value) < 1024.0:
              return "%3.1f%s%s" % (value, unit, suffix)
          value /= 1024.0
      return "%.1f%s%s" % (value, 'Y', suffix)